Sensitivity experiments to investigate the role and importance of theIndo-China Peninsula (ICP) heat fluxes (sensible and latent heat fluxes) on the South China Seasummer monsoon (SCSSM) onset and its subsequent evolu...Sensitivity experiments to investigate the role and importance of theIndo-China Peninsula (ICP) heat fluxes (sensible and latent heat fluxes) on the South China Seasummer monsoon (SCSSM) onset and its subsequent evolution have been carried out using a regionalclimate model. Two sensitivity experiments have been conducted: cutting off the sensible heat flux(noted as IChfx) and latent heat flux (noted as ICqfx). Results show that by cutting off theunderlying heat flux of the ICP, the precipitation decreases and low-level geopotential heightincreases over the local regions as well as the remote regions of the East China Sea, southernJapan, and western North Pacific. The westerly (easterly) zonal winds at 850 hPa (200 hPa) aregenerally weakened in May and June, especially before and during the onset of the SCSSM towards theend of May. It is worth noting that although the observed sensible heat flux is only about 1/3 ofthe latent heat flux, the differences between the control run and each of the two sensitivityexperiments are comparable.展开更多
基金This research was jointly supported by the Research Grants Council of the Hongkong Special Administrative Region Governmentof China Grant CityU 2/00C and the China NSFC Project 90411007.
文摘Sensitivity experiments to investigate the role and importance of theIndo-China Peninsula (ICP) heat fluxes (sensible and latent heat fluxes) on the South China Seasummer monsoon (SCSSM) onset and its subsequent evolution have been carried out using a regionalclimate model. Two sensitivity experiments have been conducted: cutting off the sensible heat flux(noted as IChfx) and latent heat flux (noted as ICqfx). Results show that by cutting off theunderlying heat flux of the ICP, the precipitation decreases and low-level geopotential heightincreases over the local regions as well as the remote regions of the East China Sea, southernJapan, and western North Pacific. The westerly (easterly) zonal winds at 850 hPa (200 hPa) aregenerally weakened in May and June, especially before and during the onset of the SCSSM towards theend of May. It is worth noting that although the observed sensible heat flux is only about 1/3 ofthe latent heat flux, the differences between the control run and each of the two sensitivityexperiments are comparable.
